Year : 2021, Volume : 16, Issue : 1
First page : ( 301) Last page : ( 303)
Print ISSN : 2230-9047. Online ISSN : 2231-6736. Published online : 2021  09.

Comparative Study of Direct Seeded Rice and Transplanted Rice Against Incidence and Intensity of Stem Borer and Leaf Folder

Singh R.K.

Krishi Vigyan Kendra, Hazaribag, Jharkhand

Email id: rksingh.icar@gmail.com

Received:  01  November,  2020; :  01  ,  2021.

Abstract

Present study was conducted in 2014 and 2015 to endow with appropriate information for implementing Integrated Pest Management (IPM) practices for controlling the stem borers and leaf folder in rice crop. Treatments comprised the crop sown on four different dates at the ten days intervals starting from the 10^th July with direct seeded (T₁) and rest three by transplanting on 20^th July (15 days old seedling) (T₂), 30^th July (30days old seedling) (T,) and on 10^th August (40 days old seedling) (T ₄), to observe the rate of stem borer and leaf folder infestation. The data on the incidences of insect pests and yield performances of rice were studied. Dead heart (per sq.m) were highest (16.1) in T₄ and lowest (4.9) in T₂. The yield of the crop was highest in treatment T₂ with B:C ratio of 2.46. Rice leaf folder and stem borer incidence were observed maximum during crop growth period in direct seeded rice under unprotected situation in both the seasons. Maximum dead heart caused by stem borer was noticed in vegetative phase of the crop while the peak incidence of white ears was observed in direct seeded field. Stem borer population emerged more from stubbles in direct seeded as compared to transplanted rice. It was found that transplanting on 20 ^th July with 15 days old seedling was the most resistant having the lowest stem borer and leaf folder infestation among other plantings.

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Keywords

Cnaphalocrocis medinalis, Direct seeded rice, Planting time, Puddled transplanted rice, Resistance, Scirpophaga incertulas.

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